Question

12) Write an equation for the dissociation of ethylene, C2H4. Hint: does ethylene dissolve in water? 13) If 0.24 g of a gas dissolves in 1.0 L of water at 1.5 atm of pressure, how much of the gas will dissolve if the pressure is raised to 6.0 atm? Assume the temperature is held constant. 14) Name an example of boiling point elevation or freezing point depression that is used in everyday life. Examples from class or in the notes will not be accepted.

Answer 1

SOLUTION:

PART 12:

The reaction is given by:

C2H4 + H2O + C2H5OH

PART 13:

According to Henry's law, At constant temperature, pressure of a gas is directly proportional to the solubility of the gas.

S = KH.P

Given that,

Pressure, P = 1.5 atm.

Solubility of gas, S = 0.24 g/L.

Therefore, Henry's constant is given by:

S 0.24 g/L -0.16 g/L.atm Ky = = = 1.5 atm

Therefore, Solubility of gas at 6 atm is given by:

S = Ky.P=0.16 g/L.atm x 6 atm

::S=0.96 g/L

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